Arguments

params

A mizer params object for the original system.

...

Other arguments (unused)

species_params

The species parameters of the new species we
want to add to the system.

SSB

The spawning stock biomass of the new species. If not provided,
the abundance of the new species will be chosen so that its maximal
biomass density lies at half the community power law.

rfac

A number that determines the strength of the non-linearity in
the Beverton-Holt stock-recruitment relationship. The maximal recruitment
will be set to rfac times the normal steady-state recruitment.
Default value is 10.